Protector mechanism for looms



E. W. STONE PROTECTOR MECHANISM FOR LOOMS Jan. 7, 1930.

Filed April 15, 1929 2 Shets-Sheet 1 /N VENT'OR/ 47TORNE) Jan. 7, 1930.w, STONE 1,742,882

' PROTECTOR MECHANISM FOR Looms Filed April 15, 1929 2 Sheets-Sheet 2ATTORNEY Patented Jan. 7, 1930 UNITED STATES PATENT ()FFICE FORD CARPETCOMPANY, OF THOMPSONVILLE, CONNECTICUT, A CORJPORATION OF" MASSACHUSETTSPROTECTOR MECHANISM FOR LCOMS- Application filed April 15,

This invention relates to looms, and is more particularly directed tothe protector mechanism whereby the loom is stopped and the lay arrestedwhen the shuttle fails to be properly It is now the common practice toprovide looms with some character of protector mechanism to preventinjury to the warp threads when, during weaving, a shuttle fails to beproperly boxed or remains partly in the shed. In the absence of somemeans to stop the loom and arrest frontward movement of the lay the warpthreads are liable to become seriously injured or broken.

There are now generally recognized two different forms of protectormechanism, one in which a rod or other shipper controlling means isoperated when the shuttle fails to box properly and the lay is thereuponarrested before it reaches front position. The second form of protectormechanism is that generally known as the sliding frog which is engagedby a dagger as the lay moves frontwardly, and through the sliding frogthe loom is brought to rest.

During recent years a demand has arisen for fabrics of increased width,such, for instance, as carpets, rugs and the like, and this hasintroduced serious problems with respect to the protector mechanism byreason of the fact that as the lay is of increased length and weight,its momentum is greatly augmented, so that protector mechanism which maybe practical and efiective in the narrower looms becomes unsuitable forthe wider looms where the lay momentum must be overcome before the layreaches front position.

In accordance with the present invention. the loom stopping mechanism isassociated with a bumper mounted on the breast beam for engagement withthe dagger when a shut tle fails to properly box, and means are providedto so control the bumper as that notwithstanding the lay momentum thatmust be overcome, the bumper will act to arrest the lay movement beforethe lay reaches front position and prior to the breaking of a warpthread by a trapped shuttle.

More specifically stated, the present inven- 50 tion contemplates abumper of novel construc- 1929. Serial No. 355,043.

tion under the influence of one or more heavy springs to permit thebumper to yield to an extent and yet arrest the lay movement beforeinjury is done tothe warp threads.

The invention and novel features'thereof will best be made clear fromthe following description and the accompanying drawings of one good formthereof, and while the present invention may be advantageously employedin looms of any width, it is more especially applicable and itsadvantages more clearly manifested in a loom for weaving wide fabrics,such as carpets, rugs and the like.

In the drawings:

Fig. 1 is aside elevation with parts in section and others broken away,showing sufiicient portions of a loom embodying the pres ent invention;

Fig. 2 is a perspective view at one side of a loom containing thepresent invention, some of the parts being broken away;

, Fig. 3 is an enlarged sectional plan view showing the details of thenovel bumper.

The I loom frame may be of any desired construction but as herein shownit is of the general character that is adapted for weaving heavy fabricssuch as carpets, rugs and the like, and comprises side members 1 inwhich is supported the lay operating shaft 2 which may be convenientlydriven by a gear 3 from a driver 4:. The lay 5 is mounted as usual uponthe lay swords 6" which are mounted uponthe lay rock shaft 7 extendingtransversely of the loom.

As shown in the present instance of the invention, the lay operatingshaft 2 is provided with suitable crank arms 8 which are connected tothe toggles 9 and 10, one of which, as-lO, is secured to a frontwardprojection of the lay sword 6 and the other of which, as 9, is attachedto a portion of the loom frame to the rear of the lay sword, theconstruction being such that when the lay operating shaft 2 is rotated,the lay will be given its usual beat-up movements.

The loom is provided, as usual, with a takeup mechanism for taking upthe cloth as it is woven, and this is typified in Fig. 1 wherein thecloth roll 12 is shown as actuated from a worm wheel 13 engaged with aworm 14 tle boxes 17, one at each end thereof, and only driven throughsuitable mechanism, such, for instance, as the toothed wheels 15 and 16which may be operated from any going part of the loom. The details ofthese portions of the loom constitute no part of the present inventionand require no further explanation.

The lay 5 is provided with the usual shutone of which is shown in Fig.2. As usual, also, each shuttle box is provided with a binder, such, forinstance, as 18, shown in the present instance as associated with thefront box plate 19, but since these parts may also be of any general andwell-known construction they require no further explanation except thatwhen the shuttle 20 enters the shuttle box and is properly therein, thebinder 18 will be moved outwardly by the shuttle.

Mounted upon the lay is the protector rod 21 from which extend thefingers 22, one at each side'of the loom, and such fingers are held incontact with their respective binders 18 by yielding means, such, forinstance, as the spring 23, one end of which is secured to a bracket 24,carried by the lay, and the other end of. which is connected to aprojection 25 extending from the protector rod.

These details may obviously be varied, the essential being that when ashuttle enters the shuttle box and is properly boxed therein, theassociated binder 18 will be moved outwardly to thereby rock theprotector rod.

The protector rod 21 has secured thereto the frontwardly extendingdagger 26, whose position is obviously controlled by the protector rod.

The driver 4 for the lay operating shaft is shown in the presentinstance of the invent-ion as actuated through a gear 27 which isoperatively engaged with a gear 28 mounts ed on a shaft 29 which maybeand preferably is driven by a motor or other suitable form of drivingmeans.

Since the loom is to be stopped from time to time means are associatedwith the motor driven shaft 29 to operatively connect and disconnect itfrom the driv ng source or power, and in the present instance of theinvention this connecting and disconnecting mechanism is embodied in aclutch 30, Fig.

- 2, but obviously any means may be utilized for this purpose.

The clutch is operated by a lever arm 31 pivotally mounted at 32 andhaving its end 33 connected to a rod 34.

Mounted upon a bracket 35 is the stud 36 having therocking sleeve 37from which pro jects an arm 38 connected to the rod 34, the constructionbeing such that should they rocking sleeve 37 be actuated, it willeffect driving connection or disconnection of the gear, 28 with thedriving source. If desired, a brake 39 may be employed to assist inbringing the loom to rest, but the details of such mechanism may varywithin the true scope of the invention, as will later appear.

Extending frontwardly from the rock ng sleeve 37 is an arm 40, to thefront end portion of which is connected a link 41, the opposite endwhereof is connected at 42 to a gear actuated lug .43.

Mounted for rocking movement in a bearing 44 rising from the breast beamor other suitable support is the shaft 45 carrying the gear or pinion 46which is engaged with a toothed wheel 47 appropriately supported inbearings 48on the loom frame.

Extending from the toothed wheel 47 is the arm 49 to which is pivotedthe downwardly 2 are in loom running position, and should the stop shaft58 be rocked in a clockwise directi-on, viewing Fig. 2, it will actthrough the train of mechanism hereinbefore de- 7 scribed to disconnectthe clutch and throw the power from the machine.

It is frequently desired to control the loom operation by hand, and forthis purpose there is provided a hand lever 59 which is secured to theshaft 44, the construction being such that should the hand lever 59 beturned to the right, Fig. 2, it may act through the train of mechanismbeween it and the clutch to effect loom stoppage without disturbing theposition of the stop shaft 58, a condition that is permitted by reasonof the slot 51 in the link 50,and similarly, the loom may be started bymovement of the hand lever 59 in the opposite direction.

As hereinbefore stated, the present invention includes a bumper whichmay be actuated by the dagger on frontward movement of the lay when ashuttle fails to be properly boxed and bring the loom to rest before thelay has reacheda sufficiently frontward posi tion to cause injury to thewarp threads by a trapped shuttle.

In the present instance ofthe invention, the

bumper 6O ispivotally mounted upon the' breast beam 11 by a loosepivotal connection, constituted in the present illustrationby a pin andslot device. Referring more particularly to Fig. 3, the bumper 60 isprovided with the elongated slot 61 into which proare secured by theadjustable bolts 65 to the rear portion of the breast beam 11, theconstruction being such that the long arm of the bumper lever will benormally impelled rearwardly, or at least the frontward movement thereofwill be opposed by the strong spring action of the springs 63.

Between the loose pivotal support of the bumper lever 60 and the end ofthe long arm thereof, the bumper is provided with a frog engaging part66 preferably formed with a notch or dove-tail 67 which may be engagedby the dagger 26 when the latter is in its raised position under thedictates of the protector rod 21 when a shuttle fails to be properlyboxed.

Secured to the loom frame, and as shown in the present instance of theinvention, there is a fulcrum stop 68 which may be conveniently formedby a bolt 69 and secured to the loom frame or breast beam 11 by suitablemeans, such as the nut 70, and the short arm 71 of the bumper lever isprovided with an engaging end 7 2 which rests against the fulcrum stop68 under the backward pull of the springs 63 acting on the long arm ofthe bumper lever and tending to turn the bumper lever about its pivotalconnection with the breast beam, as indicated in Figs. 2 and 3.

From the construction described it will be apparent that when thebumperlever 60 is actuated by the frog 26 on frontward movement of the lay,the bumper lever will turn about the fulcrum stop 58 as a center and thesprings 63 will exert their maximum effort to arrest the frontwardmovement of the lay. As the bumper lever is thus actuated, the loosepivotal connection between it and the breast beam relieves the pivotalconnection from strain, which would be liable to shear the pinconstituting one of the pivotal connection elements.

Mounted upon the stop rod 58 is the arm 73, the upper end portion ofwhich is connected to a shackle 74: on the long arm of the bumper lever,with the result that when the bumper lever is turned about the fulcrumstop against the stress of the springs 63 as the'lay moves frontwardly,the stop shaft 58 will be rocked and through the connections with theclutch, as hereinbefore described, will throw the power from the machineand the lay will be yieldingly arrested by the energetic action of thesprings 63 before it reaches front position, notwithstanding theincreased momentum of the lay due to its weight.

What is claimed is:

1. In a protector mechanism for looms, the combination of the breastbeam, the lay, and shuttle boxes, a protector rod on the lay having adagger, a bumper for engagement by the dagger on frontward movement ofthe lay when the shuttle fails to be properly boxed, a loose pivotalconnection between the breast beam and bumper permitting pivotal andbodily movement of'the bumper relative thereto, a fulcrum stop, yieldingmeans acting upon the bumper to engage the end thereof with the fulcrumstop that the latter may take the strain transmitted to the bumper bythe dagger and prevent injury to the said pivotal connection, and loomstopping mechanism actuated by the bumper.

2. In a protectormechanism for looms, the combination of the breastbeam, the lay, and shuttle boxes, a protector rod on the lay having adagger, a bumper forengagement by the dagger on frontward movement ofthe lay when the shuttle is not properly boxed, loom stopping means, apin and slot connection between the breast beam and bumper permittingthe bumper to move bodily relative to its connection with the breastbeam, a fulcrum stop on the breast beam, yielding means acting upon thebumper to. turn it about its connection with the breast beamand engagethe end of the bumper with the fulcrum stop that the bumper may turn,about the fulcrum stop as a center under impact of the dagger.

3. In a protector mechanism for looms, the combination of the breastbeam, the Lay, and shuttle boxes, a protector rod carried by the lay andhaving a dagger, a bumper lever having a pin and slot connection withthe breast beam, a fulcrum stop mounted for engagement by the endportion ofv the bumper lever and constituting the center about which thebumper lever moves under the impact of the dagger, spring means actingupon the opposite end portion of the bumper lever and stopping mechanismactuated by the bumper.

4. In a protector mechanism for looms, the combination of'the breastbeam, the lay, and shuttle boxes, a protector rod carried by, the

lay and having a dagger, a bumper constituted as a lever having a pinand slot connection with the breast beam adjacent one end of the lever,a spring actingupon the bumper remote from its pin and slot connectionwith the breast beam and tending-to turn the long arm of the leverrearwardly, and a fulcrum stop engaged by the end of the short lever armto sustain the impact of the dagger with the bumper.

5. In a protector mechanism for looms, the combination of the breastbeam, the lay, and shuttle boxes, a protector rod carried by the lay andhaving a dagger, a bumper constituted as a lever, a pin and slot pivotalconnection between the bumper lever and breast beam forming long andshort lever arms, spring means acting on the long lever arm tending toturn it rearwardly, and a fulcrum stop on the breast beam against whichthe short lever arm bears and about which the bumper lever turns as acenter under the impact of the dagger.

6. In a protector mechanism for looms, the

combination of the breast beam, the lay, and shuttle boxes, a protectorrod carried by the lay and having a dagger, a bumper constituted as alever, a pin and slot pivotal connection between the bumper lever andbreast beam forming long and short lever arms, spring means acting onthe long lever arm tending to move it rearwardly, a fulcrum stop on thebreast beam against which the short lever arm bears and about which thebumper lever turns as a center under the impact of the dagger, and adagger engaging part carried by the long arm of the bumper lever.

7. In a protector mechanism for looms, the combination of the breastbeam, the lay, and shuttle boxes, a protector rod on the lay havinga'dagger, a bumper for engagement by the dagger on frontward movement ofthe lay when the shuttle fails to be properly boxed, a loose pivotalconnection between the breast beam and bumper permitting pivotal andbodily movement of the bumper relative thereto, a fulcrum stop, yieldingmeans acting upon the bumper to engage the end thereof with the fulcrumstop that the latter may take the strain'transmitted to the bumper bythe dagger and prevent injury to the said pivotal connection, loomstopping mechanism actuate by the bumper, a stop shaft connected to thebumper lever, and means actuated by the stop shaft on frontward movementof the bumper lever to stop the loom. p

8. In a protector mechanism for looms, the combination of the breastbeam, the lay, and shuttle boxes, a protector rod carried by the lay andhaving a dagger, a bumper constituted as a lever, a pin and slot pivotalconnection between the bumper lever and breast beam forming long andshort lever arms, spring means acting on the long lever arm tending tomove itrearwardly, a fulcrum stop on the breast beam against which theshort lever arm bears and about which the bumper lever turns as a centerunder the impact of the dagger, a stop shaft, an arm extending from thestop shaft and actuated by frontward movement of the long lever arm ofthe bumper lever, and means actuated by rocking movement of the stopshaft to stop the loom. In testimony whereof, I have signed my name tothis specification. V

EDWIN W. STONE.

